over each of the 166 counts against james holmes. we also heard from an fbi bomb tech, an atf supervisor, who testified about the extent to which holmes booby-trapped his apartment with homemade napalm, propane and gas triggers. in the two months leading up tote shooting holmes purchased 6295 rounds of ammunition as well as tear gas, ballistic gear and handcuffs. on cross-examinations holmes defense attorney asked one of the agents if there was anything in colorado law that prevented someone with mental illness from making any of these purchases and the agent said no, jenna. jenna: there comes up for one of the first times it is coming up in this preliminary hearing. we know the defense will be calling its own witness. tell us about who those people potentially could be and also how does that procedure, a defense calling witnesses in this preliminary hearing, how typical is that? >> that isn't something that usually happens but legal analysts are saying that what they think is happening here is that the defense is using this opportunity in the hearing to start the process of b
